N a device for setting the automatic stops that locate the column margins on a typewriter 制表机
Observers were told to stay several feet away from the tabulators, on one side of the room marked off by green tape.
观察人员被告知要待在房间里用绿色胶带标出的那一边，距离制表机几英尺远的地方。
At first this meant making punch-card tabulators, but IBM moved on to magnetic-tape systems, mainframes, PCs, and most recently services and consulting.
最初，它制造穿孔卡显示器，之后开发磁带系统，大型计算机及个人计算机，如今，又转向服务和咨询业务。
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